The largest terrestrial planet, Earth has a diameter only one quarter as great as the diameter of the smallest Jovian planet, Neptune, and its mass is only one seventeenth as great.
最大的类地行星地球的直径仅仅是最小的类木行星海王星的四分之一，而且地球的质量仅仅是其质量的十七分之一。
Those ideas about terrestrial planet formation and habitability of terrestrial planets will need to be re-evaluated from scratch.
那些关于类地行星形成与类地行星可居住性的概念将需要从头开始重新进行评估。
The finding contradicts the prevailing notion that a terrestrial planet needs a large moon to stabilize the orientation of its axis and, hence, its climate.
该发现跟一种流行的观念相抵触，这种观念认为类地行星需要一颗巨大的卫星来稳定行星轴的方向性，进而稳定其气候。
And the Terrestrial Planet Finder, an even more ambitious project that might have been able to study alien atmospheres, has been postponed indefinitely.
而作为将可能具有研究外星大气功能的更具雄心的项目，“类地行星搜索者”已被无限期延期。
If such planets exist, these missions-nasa's Terrestrial planet Finder and ESA's darwin-should be able to scan their atmospheres for the presence of gases that would indicate the existence of life.
如果真的有这类行星存在，NASA的类地行星搜寻者，以及ESA的达尔文计画等任务，将得以探测它们的大气，寻找象征生命存在的气体。
If such planets exist, these missions-nasa's Terrestrial planet Finder and ESA's darwin-should be able to scan their atmospheres for the presence of gases that would indicate the existence of life.
如果真的有这类行星存在，NASA的类地行星搜寻者，以及ESA的达尔文计画等任务，将得以探测它们的大气，寻找象征生命存在的气体。
应用推荐